Yarn furnishing device



Jan. 26, 1954 c. F. MANGER YARN FURNISHING DEVICE 5 Sheets-Sheet 1 Filed001;. 24, 1950 Jan. 26, 1954 c. F. MANGER YARN FURNISHING DEVICE 5Sheets-Sheet 2 Filed Oct. 24, 1950 c. F. MANGER 2,667,266

YARN FURNISHING DEVICE 5 Sheets-Sheet 3 F/G 3A.

Jan. 26, 1954 Filed Oct. 24, 1950 Jan. 26, 1954 c. F. MANGER YARNFURNISHING DEVICE 5 Sheets-Sheet 4 Filed 001;. 24, 1950 Inventor aw 114M72 Jan. 26, 1954 c. F. MANGER YARN FURNISHING DEVICE 5 Sheets-Sheet 5Filed Oct. 24. 1950 I nventor ml $51M By (MA-0Q Patented Jan. 26, 1954YARN FURNISHING DEVICE Charles Frederick Manger, Leicester, England,assignor to The Bentley Engineering Company Limited, Leicester, EnglandApplication October 24, 1950, Serial No. 191,780

Claims priority, application Great Britain October 29, 1949' Claims.

This invention is an improved yarn furnishing device for textilemachines and its chief object is a construction of yarn furnishingdevice which is particularly well suited for use, on circular knittingmachines, for feeding elastic yarn (either covered or uncovered) to theneedles, such yarn being either knitted by the needles or incorporatedin the fabric withoutbeing knitted.

Unless special precautions are taken to avoid it, difliculty will .beexperienced in incorporating or knitting elastic yarn in, tubularknitted fabric owing to the fact that, for various reasons, the yarn isnot drawn off the bobbin or other wound supply with an even tension. Toovercome this difficulty proposals have alreadybeen made for a yarnfurnishing device comprising two rotary furnishing members which feedthe yarn between them and of which one is movable. over the surface ofthe other in order to vary the rate of feed of the yarn according totheir relative positions. .Such a device has included means for drivingone of these members and a yarn tensioning device to tension the yarnbefore it enters between the furnishing members.

The present invention comprises a modified form of such a device andincludes, broadly, the combination of a rotary furnishing disc, arotaryfurnishing roller cooperating with the face of the disc to grip theyarn, means for adjusting the roller towards and away from the center ofthe disc to vary the rate of yarn feed,.a pair of meshing gears fordriving .the disc .a bracket mounted for movement towards and away fromone of the gears, a spindle in the bracket carrying the disc and theother gear, and means to move the bracket in order to disengage thegears.

It is obvious that in place of a flat disc the same object can beachieved when that disc is replaced by a conical surfacagenerally ashallow conical surface. Where a disc is. referred to herein and in theclaims it'is to be understood that such a conical surface is alsoincluded.

The foregoing and otherfeatures of the invention set out in the appendedclaims are incorporate-:1 in the yarn furnishing device which will nowbe described by way :of example with reference to the accompanyingdrawings in which:

Figure 1 is a front elevation and Figure 2 is a plan of the device:

Figures 3A and3B are sideelevations of the device, showing its drivingconnections .and the mechanisms for moving the gears out of mesh;

. Figure 4 is an oppositeside elevation of a portion of ,ths'device';

Figure 5 shows a modification to be made to the device for the purposeof feeding bare elastic.

The device shown in Figures 1-4 is primarily intended for use, in acircular knitting machine, for feeding covered elastic yarn. Itcomprises a support I housing a hollow driving-shaft 2 which forconvenience in description will be considered as being vertical. Thissupport I is adjustably fixed by a clamp 3 to a post 4 on the table orother convenient part 5 of the knitting machine. At its lower end theshaft 2 is provided with a bevel or other gear 6 by which it may bedriven from a gear 1 on a running shaft 3 of the machine, and at its topend is provided with skew or helical gear 9 for a purpose hereinafterdescribed.

At the upper end of the support I there is a clamp I0 carrying a fixedspindle H the axis of which is parallel to that of the vertical shaft 2.Pivotally mounted on this spindle l l for rocking movement is a bracketl2 carrying a horizontal spindle it having a disc [4 at one end and ahelical gear l5 at the other. The gear 15 is driven by the helical gear3 secured to the upper end of the vertical shaft 2.

The disc l4 constitutes one of the furnishing members and a roller l6constitutes the other. the yarn being gripped between the surface of thedisc and theperiphery of the roller. A ball bearing of the ordinarycommercial type is used for the roller 16 and this is mounted on a pin11 which is secured to a lever I8 carried by a screw it. The latter isscrewed through the boss 20 of the bracket l2 and locked by'locknut 21'.The lever I8 is mounted on a plain part 22 of thescrew It; a spring 23encircles its boss 24 and is anchored at one end by the screw 25 in thecollar 26 also mounted on the boss 24-of the lever IS. The other end ofthe spring 23 engages a rod 21 which is fixed by a screw 28 in anotherboss 29 of the bracket 12. The spring 23 thus urges the roller ittowards the disc M to create sufficient pressure to grip the yarnbetween the roller and the disc. The degree of pressure is adjusted bypartial rotation of the collar 25 round theboss 24 of the lever 8 and bylocking position with the screw .25.

The rate of feed of theyarn is adjusted by turning the screw is by meansof its squared end 39, provided for this purpose, to bring the roller itnearer to, or farther from, the centre of disc M. The disc 14 rotates ata constant speed, be.- ing driven from the machine, andconsequently theyarn will be fed respectively slower or faster it the desired on a rod32secured in a hole in the lever 18 by the screw 33 and consists of apair of coaxial tension discs or cymbals 3 la, 3ib between which theyarn passes and which are pressed together by the spring 34, thepressure of which is adjustable by moving the collar 35 along the'rod32.

In order to interrupt the drive of the furnishing disc I4 when it isdesired to stop the elastic feed the two helical gears 9 and I5 arethrown out of mesh. For this purpose the hollow shaft 2 contains a pushrod 36 the top end of which bears against a head 31 on one arm of thebell-crank has its other arm engaged, through the adjusting screw 39,with a face of the fixed clamp l8. Thus when the control cam 48 (Figure3B), acting through-the levers 4i and 42 on the shaft 43, raises thepush rod 36, the bracket i2 is swung about the spindle H and disengagesthe gears. The spring 44 urges the gears into mesh and the extent towhich they mesh is adjusted by the screw 45.

When the yarn furnishing device is being used to feed uncovered elasticyarn, it is desirable to release the grip exercised on the yarn by theroller l6 and the furnishing disc l4 as the drive of the disc isinterrupted. For this purpose the modification illustrated in Figure 5is made. The rod 21 is removed and replaced by a rotatable rod 46 havinga flat face 41 and the lever 18 is provided with a tappet screw 48 whichbears against the flat face 41 on the rod 46 which is rotatablymountedin the boss 29. The arm 49 is attached by a screw 5|] to the rod46 and a rigid strut or abutment in the form of a push rod 5| engagesthe arm-49 at one end and an abutment 52 on the support I at the other.A spring 53 mainpivoted for movement about an axis parallel with theaxis of one of the gears, a spindle in the bracket carrying the disc andthe other gear, and means for rocking the bracket in order to disengagethe gears.

3, A yarn furnishing device according to claim 2 in which the gearhaving its axis parallel with the pivotal axis of the bracket is thedriving gear, and the other gear carried by the disc spindle is thedriven gear.

4. A yarn furnishing device according to claim 1, in which the roller isalso carried by the bracket that carries the disc.

5. A yarn furnishing device according to claim 1, having the roller alsocarried by the bracket that carries the disc, and having means fortensioning the yarn before it enters between the disc lever 38 which ispivoted on the spindle l3 and tains contact between the push rod and thearm 7 and the abutment and when the bracket l2 rotates about the spindleII to disengage the disc driving gears the boss 29 carrying the rod 46moves toward the support I and so, through the action of the push rod 5|on the arm 49 the rod 46 is caused to rotate. The latter therefore actson tappet screw 48'and swings lever 18 about pivot screw i9 so as tolift the roller 15 away from the surface of the disc l4.

Preferably, but not necessarily, the gears 9 and I5 are concealed by acover 54 mounted on the bracket l2.

What I claim is:

1. A yarn furnishing device comprising the combination of a rotaryfurnishing disc, a rotary furnishing roller cooperating with the face ofthe disc to grip the yarn, means for adjusting the roller towards andaway from the center of the disc to vary the rate of yarn feed, a pairof meshing gears for driving the disc, a bracket mounted for movementtowards and away from one of the gears, a spindle in the bracketcarrying the disc and the other gear, and means for. moving the bracketin order to disengage the gears.

2. A yarn furnishing device comprising the combination of a rotaryfurnishing disc, a rotary furnishing roller cooperating with the face ofthe "disc to grip the yarn, means for adjusting the roller towards andaway from the center of the disc to vary the rate of yarn feed, a pairof meshing gears for driving the disc, a bracket and roller supported infixed relation to the roller whereby both the roller and the tensioningmeans are moved in company as the bracket is moved.

6. A yarn furnishing device according to claim 1, having means to adjustthe pressure between the roller and the disc. 7

'7. A yarn furnishing device according to claim 1, having means toadjust the pressure between the roller and the disc which pressureadjusting means is supported from the bracket.

8. A yarn furnishing device according to claim 1, combined with meansfor tensioning the yarn before it enters between. the disc and roller,and means to adjust the pressure between the disc and roller, and havingmeans pivotally mounting said bracket for movement towards and away fromone of the said gears, wherein the disc, roller, yarn-tensioningmeansand pressure adjusting means are all supported by the said bracketand are movable in company about the pivotal axis thereof.

9. A yarn furnishing device according to claim 1, combined with means toseparate the furnishing disc and roller as the gears are disengaged.

10. A yarn furnishing device according to claim 1, combined with meansto separate the furnishing disc and roller as the gears are disengaged,said means comprising a lever pivoted on the bracket and carrying theroller, and means operatively connecting the lever with another part of,the device and so located that as the bracket is swung about its pivotthe lever is moved to separate'the roller from the disc.

11. A yarn furnishing device according to claim 1, combined with a leverpivoted on the bracket and carrying the roller, a rotatable cammingmember supported in the bracket, means operatively connecting thecamming member with the said lever, and a rigid strut engaged between afixed part of the device and the camming member on one side of its axisof rotation whereby as the bracket is swung the camming member will beturned to move the lever and carry the roller away from the disc.

12. A yarn furnishing device comprising the combination of a rotaryfurnishing disc, a spindle carrying said disc, a rotary furnishingroller for cooperating with a surface of the disc to furnish yarn, aspindle carrying said roller with the axis-of the spindle disposed in aplane transverse to that containing the axis of the disc spindle, meansto adjust the position of the roller lengthwise along its spindlethereby to adjust the roller towards or away from the center of thedisc, said meanscomprising a lever having one end mounted on'the spindlewith the roller mounted thereon at a distance from the spindle, a pairof meshing gears for drivingthe disc one of said gears being mounted onthe disc spindle, and a bracket which supports the disc spindle, whichis pivotally mounted to swing about an axis transverse to that of thesaid disc spindle, and which also supports the roller spindle, wherebythe gear carried by the bracket, the disc and the roller are movable incompany as the bracket is turned about its axis.

13. A yarn furnishing device according to claim 12, combined with meansfor tensioning the yarn supported on the lever which carries the roller.

14. A yarn furnishing device according to claim 12, combined with acamming means rotatable about an axis substantially parallel with theaxis of the roller spindle, means on the said bracket adapted to engagethe camming means an arm extending laterally from said camming means, arigid abutment engaged between the said arm and a fixed portion of thedevice and so located that as the bracket is swung about its axis thefixed abutment serves to turn the camming means and thereby to move theroller-carrying lever away from the disc.

15. A yarn furnishing device, comprising a rotary furnishing disc and arotary furnishing roller cooperating with the face of the disc to gripthe yarn, an adjustable tensioning device for applying tension to theyarn before it enters between the roller and disc, means for adjustingthe roller towards and away from the center of the disc to vary the rateof yarn feed and for moving the tensioning device as the roller is thusmoved, a pair of meshing gears for driving the disc, means for movingthe gears out of mesh to interrupt the drive, a bracket'pivoted formovement about an axis parallel with the axis of one of the two gearssaid one gear being a driving gear, a spindle in the bracket carryingthe disc and the other gear said other gear being a driven gear, andmeans for rocking the bracket to bring the driven gear out of mesh withthe driving gear.

CHARLES FREDERICK MANGER.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 577,906 Wohlgemuth Mar. 2, 1897 1,518,720 Wilkinson Dec. 9,1924 2,123,174 Lindley July 12, 1938 2,207,464 Lawson July 9, 19402,318,998 Ingalls May 11, 1943 2,432,685 Sawyer Dec. 16, 1947 2,539,527St. Pierre Jan. 30, 1951 FOREIGN PATENTS Number Country Date 342,297Great Britain Jan. 26, 1981

